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Tricolor filter in Vphot

coliac
Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 04/17/2021 - 19:59

Hi all,

I did a time series with a tricolor G filter and a CCD.

I dio not see where to select TG filters in vphot upload pages (we can see TG in LCG) .

I see UBVRI and sloan filters but no tricolor filter...

Do you know how to select this TG filter (or TB and TR)  in vphot upload page ?

Thanks

Jean

MZK
Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 04/17/2021 - 22:01
Filter Name Selection - Necessary or Not?

Jean:

When you upload your images, do you use quick upload or upload wizard? Do your images already have all the fits headers required by VPhot (see blue link in quick upload line for info)? Do your DSLR fits images have the filter named already in the headers, perhaps as G?

If you use quick upload, do you ever record your filter name anyway or do you just drag and drop into the dropbox and let it go?

Give that a try and see what happens to your images. Do they get to your account? What is the name of the filter in your available image list?

Report what you discover. We can talk some more.

Ken

coliac
Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 04/20/2021 - 19:52
Hi Ken,

 

Thanks for your…

Hi Ken,

 

Thanks for your answer. Sorry for the delay.

These are ccd images taken with tricolor G filter, not photometric filter and not DSLR image.

Important to say that I know that tricolor filters are not suitable for photometry,

but another mount with UBVRI was running simultaneously, so it left my RGB filters for tricolor imaging

and G tricolor is better than clear filter it seems to me... 

I use wizard upload and the filter is written in header fits.

BUT I do not know what name to write in the header. TG ? 

TG is the name displayed in LCG.

I tried to upload images but it doesnt succeed. Is it because I have around 300 images of another target in Vphot ?

I do not see how to upload a joined file...

Can help ?

Jean

MZK
Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 04/20/2021 - 22:43
Filter Name

Jean:

If magnitudes from such filters use the names TB, TG, TR in LCG2 would it not make sense to use those names in the fits headers?

Why not give that a try and upload that image(s) with quick upload as I mentioned above?

Are you saying that you cannot upload images with TG in the header? Yes, you cannot select TG as one of the optional filters (it doesn't exist since it is not a normal photometric filter) during VPhot upload but can you upload an image with TG in the FILTER header? Try it.

There is no impact resulting from having 300 images in your VPhot account. I have thousands. They are automatically deleted after about 100 days. I manually delete them sooner to save space for all users. Do not upload duplicate images (identical date/time).

What do you mean by a "joined" file? Compressed, zipped, multiple/zipped as 1?

Why not start with one "new" (not already existing on your image list) image, with TG in the filter header (enter manually if needed), select quick upload, drag and drop this image into the drop box and report what happens. Does it get to your vphot available image list? What scope did you select initially? Do you have your observer code in either OBSERVER header or USERNAME header? Does your TELESCOP header match the system name or display name in VPhot?

VPhot needs some info to understand who observed this and what scope was used to match it!

Ken

coliac
Affiliation
American Association of Variable Star Observers (AAVSO)
Wed, 04/21/2021 - 22:08
Hi Ken,

 

Thanks for you…

Hi Ken,

 

Thanks for you reply.

Well I changed TG in the header of 5 images

I then uploaded the images in image list (quick upload and wizard)... the images show no problem

during upload but there were no images in the list...

 

I looked in the DSLR guide but it shows the DSLR page upload for individual measurement not for time series...

So it is asking me a question... how can I upload images from DSLR sensor if TG, TB or TR is not possible ?

(because i have many DSLR lightcurves to upload too)

How can do LCG to show TB, TR, TG lightcurves if these filters do not appear in the folding list of uploading ?

Cheers

Jean

coliac
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 04/22/2021 - 06:06
Dear Ken,

 

Thanks for…

Dear Ken,

 

Thanks for your 2 images of AM CNC.

I saw that you succeeded to enter TG filter... but how did you do ?

Moreover, I know that I can change the filter in the "rename" page.

but here too, no filter as TG, TB or TR are available, so how uploading DSLR photometry ?

Well I do not understand...

Jean

MZK
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 04/22/2021 - 13:31
Filter Header Name

Jean:

Imaging software, not vphot, inserts the fits filter header in the images. You mentioned previously that you edited the filter name in the FILTER header, so your imaging/processing software must do this for you?

My imaging software (Maxim) does this for me. I assume that your imaging software put some filter name into the header initially? Why did you have to edit the header. Couldn't you set your filter names correctly (as you desired) in this software so that the desired name was present? As I have tried to indicate before, even that step is not actually necessary. Any filter name including GREEN would make it. (BTW, that is is not a good name for other reasons.)

My suspicion is that something in your vphot telescope settings or your other fits headers (e.g., OBSERVER, TELESCOP) do not match and your uploaded images get placed somewhere else (or nowhere) than your normal account image list? I see in an admin daily report that many of your CFO images (e.g., 160 yesterday) are getting to vphot. Are you aware of this? I mentioned it in one of my separate emails.

BTW, I have sent a few emails through your AAVSO profile page but have not gotten an answer. I offered to skype or zoom to try to figure this out. I find that process more efficient.

Ken

coliac
Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 04/24/2021 - 14:10
Hi Ken

Yes I updated the…

Hi Ken

Yes I updated the header with my software writting TG in a series file.

And uploaded the files with the header filled with TG

I didn't know that my images didn't match as I didn't understand your sentence... sorry...

I will send you a mail if you have a moment. Sure it is a small problem as you succeeded.

Thanks

Jean

hrickdiz
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 04/22/2021 - 11:56
Filter name and upload problems

I also do not know how to handle the naming of filters for images from a one-shot-color camera (ZWO color CMOS). And when I did upload some files to VPHOT the other day they just disappeared. 

Rick

MZK
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 04/22/2021 - 13:54
Upload Issues

Rick:

I assume that you are separating your OSC images into the RGB channels per the DSLR Manual and saving them as fits files?

I hope that your imaging software is inserting all the necessary fits headers into your separate images. Is there a FILTER fits header in your images? What name is inserted there? Logical names might be GREEN, G, TG, V. For processing as a photometric magnitude like V, some names work better than others but that is a separate issue from uploading.

I assume you have set up your vphot telescope settings correctly?

Have you ever been able to upload any images to your vphot account before? Just try to drag and drop your images, with whatever FILTER header name you have, into the Quick Upload dropbox. This does assume that your software has inserted the required headers into your images.

I'm willing to skype or zoom with you too. Advise me at kenmenstar@gmail.com.

I know that the upload process works with different filter names for me and others, so let's figure this out and tell everyone.

Ken